Coated grooving or parting insert

US6261673A · kind A · utility

Assignee

• SANDVIK AB · SE

Inventors

• Ingrid Reineck · Stuvsta-Snättringe, SE
• Torbjorn Selinder · Stockholm, SE
• Anders Piirhonen · Sandviken, SE
• Gregor Kullander · Alvesta, SE

Key dates

• Filing date: Jul 8, 1999
• Grant date: Jul 17, 2001
• Expiry date: Jul 8, 2019

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/252
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

The present invention relates to a coated cutting tool insert useful for grooving or severing steel components such as steel or stainless steel tubes and bars. The insert is characterized by WC--Co-based cemented carbide substrate having a highly W-alloyed Co-binder phase and a relatively thin coating including an inner layer of TiC.sub.x N.sub.y O.sub.z with columnar grains followed by a layer of fine grained .kappa.--Al.sub.2 O.sub.3 and a top layer of TiN.